CN111379776A - Acorn ring groove single-side fastener and mounting method thereof - Google Patents
Acorn ring groove single-side fastener and mounting method thereof Download PDFInfo
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- CN111379776A CN111379776A CN202010292487.0A CN202010292487A CN111379776A CN 111379776 A CN111379776 A CN 111379776A CN 202010292487 A CN202010292487 A CN 202010292487A CN 111379776 A CN111379776 A CN 111379776A
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- groove
- rivet
- tail
- ring
- acorn
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 44
- 238000009434 installation Methods 0.000 abstract description 10
- 238000011900 installation process Methods 0.000 abstract description 9
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 208000002193 Pain Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
- B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/04—Rivets; Spigots or the like fastened by riveting
- F16B19/08—Hollow rivets; Multi-part rivets
- F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
- F16B19/1027—Multi-part rivets
Abstract
The invention discloses an acorn ring groove single-side ring groove fastener and an installation method thereof. The rivet is composed of a rivet head, a polished rod, a locking groove, a ring groove transition section and a tail ring groove in sequence, and the lantern ring is composed of a sleeve and a rail; the rivet tail structure has a plurality of juxtaposed ring grooves of successively decreasing diameter. The fastener structure is researched and innovatively designed, particularly, the fillet transition structures between the locking groove and the tail annular groove and in the tail annular groove are designed, and the acorn-shaped annular groove structures with the diameters reduced in sequence are designed, so that the stress concentration phenomenon in the installation process can be avoided, the rivet is damaged, the tensile force applied to the rivet by an installation tool in the installation process can be decomposed, the local stress of the rivet is reduced, the overall bearing capacity of the rivet is increased, and the installation process can be stably carried out; the straight portion of afterbody can make things convenient for mounting tool to install, further protects rivet and mounting tool, increases its life.
Description
Technical Field
The invention belongs to the technical field of riveting, in particular to design and manufacture of an acorn ring groove single-side pull rivet riveting fastener for blind hole connection, and belongs to the riveting class (B21J) and the fastener class (F16B) of metal machining.
Background
When the double-sided riveted blind rivet is installed, the rivet is inserted into the installation hole from the front side of the connected piece, the lantern ring is sleeved on the periphery of the rivet from the rear side, the head of the lantern ring is arranged in front, and the lantern ring cylinder is arranged in the rear; and the riveting device arranged at the rear sides of the two connected pieces clamps the pull groove section at the tail part of the rivet to perform pull riveting. After riveting, the lantern ring cylinder is deformed and then radially pressed on the periphery of the ring groove section of the rivet, and the head of the lantern ring is axially pressed on the surface of the connected piece at the rear side, so that the two connected pieces are fastened. However, the premise of double-sided riveting is that enough space is required on both sides of the object to be riveted. In actual work, especially in the assembling process, only one side of an object has enough space, the space of the other side is very limited, and even a connecting bolt cannot be placed into the object, such as the fastening piece connection of a blind hole. Therefore, it is often applied to a single-deformed connecting blind rivet.
Conventional single face warp and connects rivet fastener accomplishes rivet stem and lantern ring equipment before using, only need insert the mounting hole from connecting piece one side when the equipment back installation, then after stinging the single face connection product afterbody through the jack catch in the riveter, drive the rivet and outwards move, extrude the lantern ring, lantern ring pipe portion bulging deformation forms annular protruding blind rivet head, further the sleeve extrudes the lantern ring and takes place plastic deformation, presss from both sides tightly by the riveting piece and breaks outer rivet stem, accomplishes the riveting.
Aiming at single-side riveting, because the blind hole or the structure which is not easy to enter is subjected to single-side riveting, the performance requirements on the lantern ring are different, and higher requirements are provided for the structural performance of the rivet.
In the prior art, bolts, single-groove short-tail ring groove rivets and single-side ring groove rivets of a breaking type are generally used for fastening and connecting clamped parts.
When the single-groove short-tail ring groove rivet is adopted for fastening connection, the two sides of the clamped part need to be pre-installed, the blind hole operation is not suitable, and a process hole needs to be formed on the clamped part sometimes to damage the clamped part; when the snap-off type single-sided ring groove rivet is used for fastening and connecting blind holes by a clamping piece, the rivet can generate large plastic deformation in the process of snapping the rivet off, the clamped piece can be damaged, and even the riveted joint which is completely deformed is loosened.
Disclosure of Invention
The invention discloses an acorn ring groove single-sided ring groove fastener and an installation method thereof according to the defects of the prior art. The invention aims to provide a single-side fastening connection system with an acorn ring groove, which has better performance and does not need to be broken.
The invention is realized by the following technical scheme:
the acorn ring groove blind fastener comprises a rivet and a lantern ring, and is characterized in that: the rivet is composed of a rivet head, a polished rod, a locking groove, a ring groove transition section and a tail pull groove in sequence, and the lantern ring is composed of a sleeve and a rail; the rivet tail structure is provided with a plurality of tail pull grooves which are arranged in parallel along the axial direction of the rivet and have sequentially reduced diameters.
The maximum diameter difference H between the upper stage and the lower stage of the tail pull groove with the parallel diameters sequentially reduced1Comprises the following steps: 0 is less than or equal to (H)1and/D) < 0.5, wherein D is the maximum diameter of the locking groove.
An annular groove transition section is arranged between the locking groove and the tail pull groove and comprisesA straight transition section and a bevel transition section, and the length L of the straight transition section of the ring groove1The total length of the locking groove is 0.1-1 times, and an included angle of-75-0 degrees is formed between a bus of the inclined plane transition section of the annular groove and the axis of the rivet; the root and the crest of each tail pull groove are transited through a fillet, and the axial distance L of the minimum diameter position between the adjacent tail pull grooves2Is not more than 0.5 (L)2/L1) Not more than 2.5, and the length L of the straight part of the tail ring groove3Is not more than 0.5 (L)3/L1)≤2.5。
Furthermore, the rivet tail structure is provided with at least three tail pull grooves which are arranged in parallel along the axial direction of the rivet and have sequentially reduced diameters.
The maximum diameter difference H between the upper stage and the lower stage of the tail pull groove1Comprises the following steps: 0.05 ≤ (H)1/D)＜0.25。
The length of the straight transition section of the annular groove is 0.2-0.6 times of the length of each locking groove.
The generatrix of the annular groove inclined plane transition section and the axis of the rivet form an included angle of-60 degrees to-25 degrees.
And the radius ratio of the transition fillet of the tooth bottom and the tooth top of each tail pull groove is 1-2.
The distance L between the minimum diameters of the tail pull grooves2Length L of straight transition section of ring groove1The ratio of (A) to (B) is 1 to 2.
The length L of the flat part of the tail ring groove3Is less than or equal to 1 (L)3/L1)≤1.5。
Compared with the prior art:
the fastener structure is researched and innovatively designed, particularly, the fillet transition structures between the locking groove and the tail annular groove and in the tail annular groove are designed, and the acorn-shaped annular groove structures with the diameters reduced in sequence are designed, so that the stress concentration phenomenon in the installation process can be avoided, the rivet is damaged, the tensile force applied to the rivet by an installation tool in the installation process can be decomposed, the local stress of the rivet is reduced, the overall bearing capacity of the rivet is increased, and the installation process can be stably carried out; the straight portion of afterbody can make things convenient for mounting tool to install, further protects rivet and mounting tool, increases its life.
When fastening and connecting clamped parts such as blind holes and the like, the riveting tool is more stable and reliable when grabbing the rivet for riveting due to the structural design of the rivet ring groove and the tail tooth, can implement lower riveting tension to meet riveting requirements, can make the riveting tool miniaturized and light, can effectively avoid obvious deformation of the clamped parts and the rivets in the installation process, protects the clamped parts and the rivets, prolongs the service life of the installation tool while meeting the use requirements, ensures more stable riveting combination, further protects the original structural performance of the connected clamped parts, and has no installation noise; in the installation process, the situation that the tail part of the rivet flies out to hurt installation personnel when being broken can be avoided, and potential safety hazards are reduced; after the installation is finished, the rust prevention treatment is not required to be carried out again; in the production process, raw materials can be saved, and the production period is shortened.
Drawings
FIG. 1 is a schematic illustration of a fastener rivet construction of the present invention;
FIG. 2 is a schematic view of the fastener collar construction of the present invention;
FIG. 3 is an enlarged partial schematic view of the rivet structure of the present invention;
FIG. 4 is a schematic view of a ready state of a fastening connection of the present invention;
FIG. 5 is a schematic view of a fastener of the present invention in a ready state for riveting with a riveting tool;
FIG. 6 is a schematic view of a clinch-attachment riveting process of the invention;
FIG. 7 is a schematic view showing a riveted state of the fastening connection of the present invention.
In the figure, 1.1 is a head part, 1.2 is a polished rod, 1.3 is a locking groove, 1.4 is a ring groove transition section, 1.5 is a tail pull groove, 2.1 is a sleeve, 2.2 is a rail, and L is1Is the length of the straight transition section of the ring groove, L2Is the axial distance, L, of the minimum diameter of the adjacent tail pull groove3Is the length of the straight portion of the tail broach slot, R1 is the transition fillet radius of the tooth bottom of the first tail broach slot, R2 is the transition fillet radius of the tooth top of the first tail broach slot, R3 is the transition fillet radius of the tooth bottom of the second tail broach slot, and R4 is the transition fillet radius of the tooth top of the second tail broach slot.
Detailed Description
The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the invention and is not intended to limit the invention in any way, but is equivalent or analogous to the present invention without departing from its scope.
With reference to the attached drawings.
The acorn ring groove single-sided fastener comprises a rivet and a lantern ring, wherein the rivet is sequentially composed of a rivet head 1.1, a polished rod 1.2, a locking groove 1.3, a ring groove transition section 1.4 and a tail pull groove 1.5, and the lantern ring is composed of a sleeve 2.1 and a rail 2.2; the rivet tail structure is provided with a plurality of tail pulling grooves 1.5 which are arranged in parallel along the axial direction of the rivet and have successively reduced diameters.
Parallel tail pull grooves 1.5 with successively reduced diameters and the maximum diameter difference H between the upper stage and the lower stage1Comprises the following steps: 0 is less than or equal to (H)1and/D) < 0.5, wherein D is the maximum diameter of the locking groove.
An annular groove transition section 1.4 is arranged between the locking groove 1.3 and the tail pull groove 1.5, the annular groove transition section 1.4 comprises a straight transition section and an inclined plane transition section, and the straight transition section of the annular groove has a length L1The total length of the locking groove is 0.1-1 times, and an included angle of-75-0 degrees is formed between a bus of the inclined plane transition section of the annular groove and the axis of the rivet; the root and the crest of each tail pull groove are transited through a fillet, and the axial distance L of the minimum diameter position between the adjacent tail pull grooves2Is not more than 0.5 (L)2/L1) Not more than 2.5, length L of straight part of tail pull groove3Is not more than 0.5 (L)3/L1)≤2.5。
As shown in the figure, the tail structure of the rivet in the example has at least three tail pulling grooves 1.5 which are arranged in parallel along the axial direction of the rivet and have successively reduced diameters.
Maximum diameter difference H between upper stage and lower stage of tail pull groove 1.51Comprises the following steps: 0.05 ≤ (H)1/D)＜0.25。
Length L of ring groove transition section1Is 0.2 to 0.6 times of the length of each locking groove.
As shown in fig. 3, the generatrix of the annular groove inclined plane transition section forms an included angle of-60 degrees to-25 degrees with the axis of the rivet; the ring groove inclined plane transition section forms a cone structure of which the diameter of the connecting end with the ring groove straight transition section is larger than that of the connecting end with the ring groove.
The radius ratio of a transition fillet of the tooth bottom and the tooth top of each tail broach slot is 1-2. For example, the ratio of the first tail broach slot root transition fillet radius R1 to the first tail broach slot crest transition fillet radius R2 (R1/R2) is 1 ~ 2.
Distance L between minimum diameters of tail pull grooves2Length L of straight transition section of ring groove1The ratio of (A) to (B) is 1 to 2.
Length L of straight part of tail part pull groove3Is less than or equal to 1 (L)3/L1)≤1.5。
The fastener riveting process of the present invention is illustrated in fig. 4-7. The specific installation process is as follows:
(1) as shown in fig. 4, the rivet and collar are threaded through the clamped piece in the manner shown, ready for riveting;
(2) using a special riveting tool, the rivet is extended into the riveting tool, engaging the tail broach 1.5 with the jaws in the riveting tool, as shown in fig. 5;
(3) as shown in fig. 6, the switch of the riveting tool is started, so that the jaws in the riveting tool drag the tail pull groove 1.5 to move relative to the anvil, axial force is applied to the rivet, and the anvil slightly presses the riser 2.2 of the lantern ring;
(4) as shown in fig. 7, under the action of axial force, the lantern ring sleeve 2.1 begins to deform outside the clamped piece, the anvil continues to press the rail 2.2 part of the lantern ring, when the lantern ring deforms completely on both sides of the clamped piece, the anvil begins to move in the opposite direction, and after the lantern ring deforms completely on both sides of the clamped piece, the riveting process is completed.
Claims (10)
1. An acorn ring channel blind fastener comprising a rivet and a collar, characterized in that: the rivet is composed of a rivet head, a polished rod, a locking groove, a ring groove transition section and a tail pull groove in sequence, and the lantern ring is composed of a sleeve and a rail; the rivet tail structure is provided with a plurality of tail pull grooves which are arranged in parallel along the axial direction of the rivet and have sequentially reduced diameters.
2. An acorn ring groove blind fastener as claimed in claim 1, wherein: the parallel tail pull grooves with successively reduced diameters are arranged at the upper stage and the next stageMaximum diameter difference H of stages1Comprises the following steps: 0 is less than or equal to (H)1and/D) < 0.5, wherein D is the maximum diameter of the locking groove.
3. An acorn ring groove blind fastener as claimed in claim 2, wherein: an annular groove transition section is arranged between the locking groove and the tail pull groove and comprises a straight transition section and an inclined plane transition section, and the straight transition section of the annular groove has a length L1The total length of the locking groove is 0.1-1 times, and an included angle of-75-0 degrees is formed between a bus of the inclined plane transition section of the annular groove and the axis of the rivet; the root and the crest of each tail pull groove are transited through a fillet, and the axial distance L of the minimum diameter position between the adjacent tail pull grooves2Is not more than 0.5 (L)2/L1) Less than or equal to 2.5, and the length L of the straight part of the tail pull groove3Is not more than 0.5 (L)3/L1)≤2.5。
4. An acorn ring groove blind fastener as claimed in claim 3, wherein: the rivet tail structure is provided with at least three tail pull grooves which are arranged in parallel along the axial direction of the rivet and have sequentially reduced diameters.
5. An acorn ring groove blind fastener as claimed in claim 3, wherein: the maximum diameter difference H between the upper stage and the lower stage of the tail pull groove1Comprises the following steps: 0.05 ≤ (H)1/D)＜0.25。
6. An acorn ring groove blind fastener as claimed in claim 3, wherein: length L of the ring groove transition section1Is 0.2 to 0.6 times of the length of each locking groove.
7. An acorn ring groove blind fastener as claimed in claim 3, wherein: the generatrix of the annular groove inclined plane transition section and the axis of the rivet form an included angle of-60 degrees to-25 degrees.
8. An acorn ring groove blind fastener as claimed in claim 3, wherein: the transition fillet radius of the root and the crest of each tail broach slotThe ratio is 1-2; the distance L between the minimum diameters of the tail pull grooves2Length L of straight transition section of ring groove1The ratio of (A) to (B) is 1 to 2.
9. An acorn ring groove blind fastener as claimed in claim 3, wherein: the length L of the straight part of the tail pull groove3Is less than or equal to 1 (L)3/L1)≤1.5。
10. A method for installing an acorn-shaped annular groove blind fastener is characterized in that: use of an acorn ring grooved blind fastener as claimed in any one of claims 1 to 9, comprising the steps of:
(1) the rivet and the lantern ring penetrate through the clamped piece to prepare riveting;
(2) using a riveting tool to extend the rivet tail pull groove into the riveting tool so that the tail pull groove is meshed with a clamping jaw in the riveting tool;
(3) starting a switch of the riveting tool to enable a jaw in the riveting tool to drag a tail pull groove to move relative to an anvil, applying axial force to the rivet, and slightly extruding a riser of a lantern ring by the anvil;
(4) under the action of axial force, the sleeve part of the lantern ring begins to deform on the outer side of the clamped part, the anvil continues to squeeze the riser part of the lantern ring, when the lantern ring deforms completely on two sides of the clamped part, the anvil begins to move in the opposite direction, and after the lantern ring and the clamped part are completely separated, the riveting process is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292487.0A CN111379776A (en) | 2020-04-14 | 2020-04-14 | Acorn ring groove single-side fastener and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010292487.0A CN111379776A (en) | 2020-04-14 | 2020-04-14 | Acorn ring groove single-side fastener and mounting method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111379776A true CN111379776A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010292487.0A Pending CN111379776A (en) | 2020-04-14 | 2020-04-14 | Acorn ring groove single-side fastener and mounting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727885A (en) * | 2021-01-19 | 2021-04-30 | 上海奥达科股份有限公司 | High-strength breaking rivet |
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| CN1423065A (en) * | 2001-11-30 | 2003-06-11 | 纽飞利有限公司 | Hollow rivet |
| CN101153623A (en) * | 2006-09-21 | 2008-04-02 | 美铝全球紧固件公司 | Higher performance sleeved interference fasteners for composite applications |
| EP2240700A1 (en) * | 2008-02-04 | 2010-10-20 | Newfrey LLC | Variable grip blind rivet |
| CN102384136A (en) * | 2011-11-14 | 2012-03-21 | 南车眉山车辆有限公司 | Connection method for large-packing force thin plates and internally locking-type single-drum rivet |
| CN202707740U (en) * | 2012-07-18 | 2013-01-30 | 南车眉山车辆有限公司 | Aluminum alloy small short-tail rivet |
| CN205744778U (en) * | 2016-05-09 | 2016-11-30 | 周银峰 | A kind of self-plugging rivet |
| CN108799293A (en) * | 2018-07-13 | 2018-11-13 | 航天精工股份有限公司 | A kind of self-plugging rivet with shearing ring |
| CN212131008U (en) * | 2020-04-14 | 2020-12-11 | 眉山中车紧固件科技有限公司 | Acorn ring groove single-side fastener |
-
2020
- 2020-04-14 CN CN202010292487.0A patent/CN111379776A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1423065A (en) * | 2001-11-30 | 2003-06-11 | 纽飞利有限公司 | Hollow rivet |
| CN101153623A (en) * | 2006-09-21 | 2008-04-02 | 美铝全球紧固件公司 | Higher performance sleeved interference fasteners for composite applications |
| EP2240700A1 (en) * | 2008-02-04 | 2010-10-20 | Newfrey LLC | Variable grip blind rivet |
| CN101981330A (en) * | 2008-02-04 | 2011-02-23 | 纽弗雷公司 | Variable grip blind rivet |
| CN102384136A (en) * | 2011-11-14 | 2012-03-21 | 南车眉山车辆有限公司 | Connection method for large-packing force thin plates and internally locking-type single-drum rivet |
| CN202707740U (en) * | 2012-07-18 | 2013-01-30 | 南车眉山车辆有限公司 | Aluminum alloy small short-tail rivet |
| CN205744778U (en) * | 2016-05-09 | 2016-11-30 | 周银峰 | A kind of self-plugging rivet |
| CN108799293A (en) * | 2018-07-13 | 2018-11-13 | 航天精工股份有限公司 | A kind of self-plugging rivet with shearing ring |
| CN212131008U (en) * | 2020-04-14 | 2020-12-11 | 眉山中车紧固件科技有限公司 | Acorn ring groove single-side fastener |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727885A (en) * | 2021-01-19 | 2021-04-30 | 上海奥达科股份有限公司 | High-strength breaking rivet |
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